Tuyere



(No Model.) 2 Sheets-Sheen 1.

N. 0. SWENSON.

TUYBRE.

No. 285,367. Patented Sept. 18, 1883.

7 [4 "Milli a ra/6276b 2 WZW /w. m

- UNITED STATES PATENT OFFIC'FI.

NILS OLOF SYVENSON, OF CHICAGO, ILLINOIS.

TUYERE.

SPECIFICATION forming part of Letters Patent No. 285,362, dated September 18, 1883.

Application filed'March S, 1883. (No model.) i

, clare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The object of my invention is the construction of a system of tuyere heads or caps of different sizes and forms, to be used in connection with a blacksmiths forge to facilitate the heating therein of different sizes and classes of work.

It consists more particularly of the devices herein described and claimed, and illustrated in the accompanying drawings, in which- Figure 1 is a plan view of the forge and tuyere provided with one of my improved tuyere-heads; Fig. 2, a side sectional View of the same; Figs. '3 and 5, plan views of the novel forms of tuyere-cap; Figs. 4 and 6, respective sectional views of the same, and Fig... 7 a detached plan view of another form of tuyere-cap.

In the drawings, A represents an air-box, into which extends a blast-pipe, b, of the usual form, and which may be provided with the usual valve to regulate the draft." The air-box is also provided at one end with a door, (1, hinged to a rod, 0, which rod is supported by lugs 0 extending down on each side of the under surface of the box. This door is fastened by means of a thumb-piece, 0 having an inner piece, d, which is turned up into a slot, (1, in a sill, d

The air-box may be extended a sufficient distance on. both sides of the tuyere-head to admit of its being supplied with a door of this character at each end. Such a door or doors located within the forge will be found most convenient in removing slag and ashes from the wind-chest.

D is the tuyere or crown-head, of circular form, through which the blast-pipe b enters, and is provided with an inner annular flange near its top. E represents what may be termed a receiver. It is a circular piece provided with a shoulder to set onto the annular flange in the head D, having an inner conical-shaped recess terminating in a circular head and rim, and is adapted to receive the caps F and K. The cap F has a convex top, a conical-shaped interior recess, and a central aperture divided by the wedge-shaped partition f into two sections. The cap K (a plan view of which is given in Fig. 7 isthe same in size and shape,

except that it is provided with four holes, i it 1',

instead of two, as cap F.

G (as shown in Figs. 3 and 4) is an oblong cap with perforations 9 through its upper surface, having downwardly extending inclined walls inclosing air-space 9 with a circular base, having suitable rim or flange to adapt it to fit into the roundhead D of the air-box.

H (as shown in Figs. 5 and 6) is a circular cap provided with perforations h, and with air-chamber If, and having beveled walls and flanged round bottom, as in cap G, to also fit into the head D. I

Suitably-formed stoppers may be used to close any of the perforations in caps G and H for the purp osc of shutting off the blast through any portion thereof and directing it to a particular part of the work engaged upon, or when a smaller class of objects than is necessary to employ the entire number of blast holes is being worked upon. I

The object of employing these various forms of caps with a single forge and wind-chest is to permit a variation in the quantity of fire and size of cap to accommodate different classes of work. For instance, if a small piece of metal is to be heated, requiring .a small blast, a cap of the size and construction of F is placed in the receiver E, and for a larger class of work the cap K is employed with the same receiver. For still larger work such as a long shaft or a boiler, or other forms of work-the oblong or round caps G or H are employed, according to the form and size of the object to be heated. In using the caps G and H the receiver E is removed, and either of the caps G or H, as desired, and constructed as heretofore described, is placed in the tuyerehead D. The caps can be shifted by means of tongs.

By this arrangement a blacksmith with one forge and tuyere is prepared to do a great variety of work, however small or large, to great advantage. This form of tuyere can be used with all forges of known'ordinary construction round or square, cast-iron or other metal-or with a wooden box set in with brick and mortar in an old form of forge. XVhen made of east-iron, with a cast-iron forge, the air-box is constructed with flanges which rest in slots in the sides of the forge, and the slagdoor is arranged underneath the forge, through which the slag, &c., can be removed, as it falls into the forge, through an opening in the floor of the box.

I have shown two forms of caps for small work, adapted to be placed on one receiver in the tuyere-head, and two other forms of caps for larger work, adapted to be placed directly on the'tuyerehead; but it is obvious that, so far as the shape of the top of the caps and the number of perforations are concerned,they can be varied and the number of caps increased without departing from my invention.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s

The combination of the air-box, provided with the tuyere-head, and the receiver E, whereby caps of different sizes and perforations may be employed, substantially as described.

In testimony whereof I affix my signature in presence 'of two witnesses.

- NILS OLOF SXVENSON.

lVitnesses:

SVEN OTTO XVns'rnR, PETER SwANsoN. 

